Numbers less than 10 are positive numbers 9, 8, 7, etc. And negative numbers. So there are countless smaller than 10.

Comparison of integer sizes:

1, look at the digits first, there are many digits.

For example, 100 is greater than 20, because 100 has 3 digits, while 20 has only 2 digits.

2. The digits are the same. Starting from the highest digit, the number in the same digit is larger.

For example, if 320 is greater than 3 10, the digits are the same, and the highest hundred digits are all 3, then we will look at the next ten digits. The decimal digit of 320 is 23 10, and the decimal digit of 320 is 1, 2 > 1, so 320 is greater than 3 10.

The set of integers is countable, which means there are infinite integers. In this case, integers less than 10 are 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. These numbers are contained in an infinite set called natural number set, which is also one of the foundations of mathematics.

For other types of numbers less than 10, such as decimal or complex numbers, the situation will be different. For example, decimals less than 10 have unlimited choices in the decimal system, while complex numbers have more possibilities.

The benefits of learning mathematics:

Mathematics can improve our thinking ability.

Mathematics is a subject with strong logical thinking. Learning mathematics can help us to exercise our thinking ability better, so as to better understand and solve various problems. At the same time, mathematics can also help us cultivate our own judgment, analytical ability and reasoning ability, which are very useful in our daily life and work.

2. Mathematics can enhance our computing ability.

Mathematics is a subject that needs accurate calculation. Learning mathematics can help us improve our computing ability, so as to better deal with all kinds of problems that need to be calculated. At the same time, mathematics can also help us better understand various quantitative relations and proportional relations, so as to better analyze and solve various problems.

Mathematics can broaden our horizons.

Mathematics is a basic subject, which can be applied to many fields, such as natural science, social science, economics, computer science and so on. Learning mathematics can help us better understand the various quantitative and proportional relationships in these disciplines, so as to better grasp the core ideas and methods of these disciplines. At the same time, mathematics can also help us broaden our horizons and understand more things and phenomena, so as to better adapt to the development of society.